JFacets : the profile based framework | JFacets / ProfiledCommands

TODO : rewrite, this example really sucks !

This example shows a very simple implementation of the Command Pattern. The game here is to "profilize" commands ! We'll use ExecutableFacets, a built-in feature of JFacets that allows to make facets executable.

The scenario is to execute commands on some objects (java.lang.Integers) for different profiles. We'll use 2 commands (one per role) :

(increment, standard_role, java.lang.Integer) : increments of 1 ;
(increment, admin_role, java.lang.Integer) : increments of 10 ! ;

Here is the content of the XML facets descriptor :

[Get Code]

And here is the code for our facets :

[Get Code]

package net.sourceforge.jfacets.examples.command;

public class IncrementIntegerStandard extends BaseCommandFacet {

public Object execute() {
// we increment of 1
Integer i = (Integer)getContext().getTargetObject();
return new Integer(i.intValue() + 1);
}

}

[Get Code]

package net.sourceforge.jfacets.examples.command;

public class IncrementIntegerAdmin extends BaseCommandFacet {

public Object execute() {
// we increment of ten !
Integer i = (Integer)getContext().getTargetObject();
return new Integer(i.intValue() + 10);
}

}

As you can see they both inherit from BaseCommandFacet. Here is the code :

[Get Code]

package net.sourceforge.jfacets.examples.command;

import net.sourceforge.jfacets.IExecutable;
import net.sourceforge.jfacets.IFacet;
import net.sourceforge.jfacets.IFacetContext;

public abstract class BaseCommandFacet implements IFacet, IExecutable {

private IFacetContext ctx;

public void setContext(IFacetContext ctx) {
this.ctx = ctx;
}

public IFacetContext getContext() {
return ctx;
}

public abstract Object execute();

}

And now, a main() that executes profile-based commands :

[Get Code]

package net.sourceforge.jfacets.examples.command;

import net.sourceforge.jfacets.JFacets;

public class Main {

public static void main(String[] args) {
// the target object
Integer i = new Integer(10);

// get the JFacets bean
JFacets jFacets = JFacets.get("net/sourceforge/jfacets/examples/command/jFacetsAppCtx.xml");

// execute commands
System.out.println("i = " + i);

System.out.println("Executing command (increment, john, " + i + ")");
Integer i1 = (Integer)jFacets.execFacet("increment", "john", i);
print(i1);

System.out.println("Executing command (increment, ivar, " + i + ")");
Integer i2 = (Integer)jFacets.execFacet("increment", "ivar", i);
print(i2);

System.out.println("Command example OK : check the logs !");
}

private static void print(Integer i) {
System.out.println("Result = " + i);
}

}

... and the console logs :

i = 10
Executing command (increment, john, 10)
Result = 11
Executing command (increment, ivar, 10)
Result = 20
Command example OK : check the logs !